/* DWARF2 frame unwind data structure.
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
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any later version.
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do apply in other respects; for example, they cover modification of
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GCC is distributed in the hope that it will be useful, but WITHOUT
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. *//* A target can override (perhaps for backward compatibility) how
many dwarf2 columns are unwound. */
#ifndefDWARF_FRAME_REGISTERS
#defineDWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
#endif/* The result of interpreting the frame unwind info for a frame.
This is all symbolic at this point, as none of the values can
be resolved until the target pc is located. */typedefstruct
{
/* Each register save state can be described in terms of a CFA slot,
another register, or a location expression. */struct frame_state_reg_info
{
struct {
union {
_Unwind_Word reg;
_Unwind_Sword offset;
constunsignedchar *exp;
} loc;
enum {
REG_UNSAVED,
REG_SAVED_OFFSET,
REG_SAVED_REG,
REG_SAVED_EXP
} how;
} reg[DWARF_FRAME_REGISTERS+1];
/* Used to implement DW_CFA_remember_state. */struct frame_state_reg_info *prev;
} regs;
/* The CFA can be described in terms of a reg+offset or a
location expression. */
_Unwind_Sword cfa_offset;
_Unwind_Word cfa_reg;
constunsignedchar *cfa_exp;
enum {
CFA_UNSET,
CFA_REG_OFFSET,
CFA_EXP
} cfa_how;
/* The PC described by the current frame state. */void *pc;
/* The information we care about from the CIE/FDE. */
_Unwind_Personality_Fn personality;
_Unwind_Sword data_align;
_Unwind_Word code_align;
_Unwind_Word retaddr_column;
unsignedchar fde_encoding;
unsignedchar lsda_encoding;
unsignedchar saw_z;
void *eh_ptr;
} _Unwind_FrameState;